html,body,#app{
    width: 100% ;
    height: 100% ;
    overflow: hidden;
    position: relative;
}

.full{
    width: 100%;
    height: 100%;
}
.row{
    display: flex;
}
.column{
    display: flex;
    flex-direction: column;
}
.center{
    display: flex;
    justify-content: center;
    align-items: center;
}
.between{
    display: flex;
    justify-content: space-between;
}
.around{
    display: flex;
    justify-content: space-around;
}
.flex-1{
    flex: 1;
}
.hidden{
    overflow: hidden;
}

